They have made it official! Voice chat is enabled for all on the main client... Go download the latest version here: http://secure-web2.secondlife.com/community/downloads.php

Ok well it's not in the main client yet, but you can try out the Firstlook viewer for voice on the live Grid now. Get it here: http://secure-web2.secondlife.com/community/firstlook.php I'm going to start using it now, If there are any issues I'll post back here. Talk to you in Second Life...